Released September 25, 2015. Model A1688/A1633.
Repair of this device is similar to previous generations, requiring screwdrivers and prying tools. Available as GSM or CDMA / 16, 64, or 128 GB / Silver, Gold, Space Gray, or Rose Gold options.

Because you have dc connected to the battery connector doesn't mean it's short on the connector line. Set your current to 2 amps then feel for heat obviously u will feel heat around the Tristar area but that is normal

1 Answer

What makes you think it’s short…even a phone that is powered off still draws some current for the “always on” part of the circuit and potentially to charge the battery.

The proper way to test for shorts is to measure with a multimeter with the battery disconnected. Check the BATT_VCC, VCC_MAIN and PP5V0_USB lines to see if they are shorted. You can use Ohms mode or check with the DMM in Diode mode. If those lines are good, then start checking the PMIC outputs. Only when you’re satisfied the phone has no major shorts do you put power on it, otherwise you can damage the board further.

Over night it takes 60-70% of the battery(new and good battery), screen off, thats why i am thinking it must be a short somewhere that is discarching the battery, when the phone is turned on with screen on it takes around 400-500 mA, with screen off it is taking 250-350 mA.

My other iphone wich is an iphone 6, takes with the screen off somewhere like 300 mA and then drops down to 0( phone ON and screen OFF, of course)

So for the 6s i dont think it is normal to take 300 mA when phone on with screen OFF, and not dropping down like the iphone 6.

Update: I checked everything on BAT_VCC with Diode Mode and everything seems to be accordingly to the schematics, i also put some power on VCC_MAIN and it is the same thing, taking 90mA. I cant feel any heat.

Update: The board was tooked out of the case(when i checked BAT_VCC) and the peripherals are all good, i also found 2 lines on the motherboard wich are full shorted to ground. The short is generating heat but im having a hard time finding where it comes from.